12112100111 has 4 divisors (see below), whose sum is σ = 12258029112. Its totient is φ = 11966171112.

The previous prime is 12112100093. The next prime is 12112100141. The reversal of 12112100111 is 11100121121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12112100111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112100092 and 12112100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72964376 + ... + 72964541.

It is an arithmetic number, because the mean of its divisors is an integer number (3064507278).

Almost surely, 2^12112100111 is an apocalyptic number.

12112100111 is a deficient number, since it is larger than the sum of its proper divisors (145929001).

12112100111 is an equidigital number, since it uses as much as digits as its factorization.

12112100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145929000.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12112100111 its reverse (11100121121), we get a palindrome (23212221232).

The spelling of 12112100111 in words is "twelve billion, one hundred twelve million, one hundred thousand, one hundred eleven".